Lard and tallow tank



2 Sheets--Sheet 1.

(No Model.)

J; K. MARTIN. LARD AND TALLOW TANK.

Patented Apr. 18, 1882.

(No Model.) 2 Sheets-Sheet2. J. K. MARTIN.

LARD AND TALLOW TANK.

AW n u :w w m E M. I N w y N. PETERS. Photo-Lithography. W-fihinglun. oa

FFICE.

PATENT JAMES K. MARTIN, OF CHICAGO, ILLINOIS.

LARD AND TALLOW TANK.

SPECIFICATION formingpart Of Letters Patent N- 256,7l5, dated April 18,1882.

Application filed February 18, 1882. (No model.)

.to the letters of reference marked thereon,

which form a part of this specification.

This invention relates to the separation of lard or tallow from all thewater, blood, salt, fragments of membranes, and other impurities byboiling and condensation; and it is my ohject to accomplish this in aseries of tanks which may be used alternately for rendering orpurifying.

Therefore my invention consists of the devices and combinations ofdevices hereinafter described and specifically claimed.

In the accompanyingdrawings,Figure 1 represents a front elevation of twoof a series of tanks; Fig. 2, a sectional plan of the same, and Fig. 3an edge view of one of the tanks. Like letters designate correspondingparts in all the figures.

A and A denote two of a number of tanks, which are made of the usualconstruction, one exactly like the other, and each is to be providedwith a gate or man-hole on top for fillin g with the raw material andwith a valve or gate in the bottom for drawing off the water and forremoving bones and other refuse; also, with a safety-valve on top, allof which attachments are made in any usual manner, and therefore are notshown in the drawings.

B is a pipe connecting with a steam-generator and having drop-branches CC, one to each tank, which connect at their lower ends with T-couplingsa a, that communicate with the bottom of the tanks through check-valvesI) I), and the admission of steam to which is regulated by stop-valves 00. Each branch C C communicates also with the top of the tanks through astop-valve, (Z, and a check-valve, and at an intermediate point a pipe,f f, leads off each branch C 0 around and to the rear of the tanks,where such pipe enters the tank and connects with a curved pipe, 9, thatis closed at both ends and is perforated at the side toward the front ofthe tank with a row of small holes. Each pipe ff is provided also with astop-valve, h h, and a check-valve, i i.

D is a cold-water pipe, which is connected with a force-pump and hasdrop-branches E E, one for each tank. These branchcsE Econnect with theT-couplings a a at the bottom of the tanks, and have each a stop-valve,j. These branches EE communicate also with the top of the tanks, eachthrough a stop-valve, 7t, and a check-valve, I.

F is the main lard or tallow pipe, which by branches GG communicateswith the several tanks at an intermediate point, each branch having avalve or stop-gate, m m, that is operated by a lever. Three faucets, n,n, and 12 are arranged at different elevations for drawing off the lardor tallow; and 0 0 are gage-cocks.

Now, by describing my process and operation of rendering and purifyinglard or tallow the arrangement of the several pipe-connections will befully understood.

ThetankAhaving been filled through thetop with raw lard or tallow orwith salt trimmings as they come from the packing-houses, I turn onsteam through valve cand let the material cook from eight to twelvehours. After the mass has been thus cooked sufficiently I shut off thesteam and let it settle for about thirty minutes, and then by openingvalves m and m the pressure of steam which is still in the tank A willforce the larger portion of lard or tallow that has been separatedthrough pipe F and through the branches G and G into tank A. Next Iadmit cold water into the bottom of the tank A through valve j untilsaid-tank is filled sufficiently to show water at gage-cock 0, when Ishut off the water and open valve h for admitting steam into pipe f toissue through the perforations of curved pipe 9, when all the lard andtallow that is still remaining on the water will be skimmed andconcentrated at the opening to pipe G, and will be forced through pipesG and G and F into the tank A by admitting steam into the top of tank Athrough valve (1. Now,-

after gage-cock 0 shows nothing but pure water, so as to indicate thatall the lard and tallow has been withdrawn, the water is let out fromtank A, and the bones and other refuse is removed through the gate orman-hole below, when said tank is ready for a new charge of rawmaterial. After a sufiicient quantity of lard or tallow has thus beencollected in tank A from one or several rendering-tanks, I turn on steamfrom the bot-tom by opening valve 0, and allow the material to cookagain from one to two hours. Next I let in cold water from top throughvalve 70, while the steam is still admitted from the bottom until thelard or tallow is raised as high as desired, and during this operation Iopen the safety-valve to allow the escape of all repugnant gases, andafter closing the valve k and the safety-valve I boil the materialagainfrom one to two hours, then shut off the steam, allow the material tosettle, and then draw otf the now pure lard or tallow through any one ofthe faucets n, a, or a into a cooling-tank.

Heretofore the boiling and separating of lard or tallow was done in asingle tank, when the material in it being kept mixed during the en tireprocess with the bones and other impurities until allowed to cool downand settle, such lard or tallow retained a peculiar twang, that made ituntit for many purposeswithout further manipulations and treatment withchemicals for neutralizing and purifying, besides that the skimmingscould not be utilized and were' wasted.

\Vith my improved process every particle of lard or tallow is extractedand separated from the refuse, and by the boiling in a second tank andthe admission of cold water from the top simultaneously with steam fromthe bottom said water in passing through the boiling material will cleanand concentrate the particles, and thus will purify the product, so asto have a sweet and healthy taste and fine color without the applicationof any chemicals.

What I claim is l. The herein-described arrangement of a series oftanks, A A, each connected with a purpose set forth.

3. The combination of a series of tanks, A A,each connected with thelard or tallow pipe F by branches G G, having valves m and m, and eachtank containing a curved and perforated pipe, that is connected by a.branch,

f, with the steam-pipe B, all substantially as and for the purpose setforth.

4. The combination, with a series of tanks connected by pipe F andbranches G and G, having valves m m, of the steam pipe B and water-pipeD, both connected by branches with the top and bottom of all the tanksand pro vided with suitable valves, substantially as and for the purposeset forth.

5. The combination of a series of tanks, A A, each connected with pipe Fby branches G G, having valves m m, such tanks being also connected attop and bottom with steampipe B by branches 0 0', having valves (1 d and0 c, and having perforated pipes gg, that connect the pipesff with thebranches 0 C, and have valv'es h h, and with water-pipe I) by branches EE, having valves j and 7; 1;, all substantially as and for the purposeset forth.

In testimony that I claim the foregoing as my invention I atfix mysignature in presence of two witnesses.

JAMES R. MARTIN.

\Vitnesses:

F. W. KASEHAGEN, F. U. AnAMs.

